????1.????i????????????
????#include"iostream.h"
????int i=1;
????void main()
????{
????int i=i;
????cout<<i<<endl;
????}
????????
????i???????ж???????
????????????main??????????????ζ???????????????i????????г?????????????????????????????????λ??????int????????
???????????main???????????i?????????????????i????int i = 1?????
???????i???????????i?????
????2.????x?????????
#include<iostream>
using namespace std;
int main()
{
int x=2??y??z;
x*=(y=z=5);cout<<x<<endl;
z=3;
x==(y=z);cout<<x<<endl;
x=(y==z);cout<<x<<endl;
x=(y&z);cout<<x<<endl;
x=(y&&z);cout<<x<<endl;
y=4;
x=(y|z);cout<<x<<endl;
x=(y||z);cout<<x<<endl;
return 0;
}
????????
????10??10??1??3??1??7??1
????3.??????????????????
#include<iostream>
using namespace std;
int func(int x)
{
int count=0;
while(x)
{
count++;
x=x&(x-1);
}
return count;
}
int main()
{
cout<<func(9999)<<endl;
return 0;
}
????????
????8
????????????????9999???????????1????????????????????